Intersection command in SQL Server
- The number and the order of the columns must be the same in all queries.
- The data types must be compatible.
{ query_specification }
INTERSECT
{ query_specification }
In this article, we are going to use the following table for the examples:-
CREATE TABLE [dbo]. [Employee](
[Empid] [Int] IDENTITY (1, 1) NOT NULL Primary key,
[EmpNumber] [nvarchar](50) NOT NULL,
[EmpFirstName] [nvarchar](150) NOT NULL,
[EmpLAStName] [nvarchar](150) NULL,
[EmpEmail] [nvarchar](150) NULL,
[Salary] [int] NULL
)
We insert following data into the above tables:-
Insert Into Employee (EmpNumber,EmpFirstName,EmpLAStName,EmpEmail,salary)
Values(‘A001′,’Vivek’,’Johari’,’samir@abcmail.com’,200000)
Insert Into Employee (EmpNumber,EmpFirstName,EmpLAStName,EmpEmail,salary)
Values(‘A002′,’Amit’,’Kumar’,’amit@abcmail.com’,100000)
Insert Into Employee (EmpNumber,EmpFirstName,EmpLAStName,EmpEmail,salary)
Values(‘A003′,’Neha’,’Sharma’,’neha@abcmail.com’,300000)
Insert Into Employee (EmpNumber,EmpFirstName,EmpLAStName,EmpEmail,salary)
Values(‘A004′,’Chandra’,’Singh’,’vivek@abcmail.com’,320000)
Insert Into Employee (EmpNumber,EmpFirstName,EmpLAStName,EmpEmail,salary)
Values(‘A005′,’Avinash’, ‘Dubey’,’avinash@abcmail.com’,250000)
Example
Select Empnumber from employee where salary>200000
A003
A004
A005
Select Empnumber from employee where salary between 100000 and 320000
A001
A002
A003
A004
A005
Now if we use Intersection command between these queries, we get the following result.
Select Empnumber from employee where salary>200000
INTERSECT
Select Empnumber from employee where salary between 100000 and 320000
Result
A003
A004
A005
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